Sodium Zinc Carbonate (SZC) is a chemical compound that has a formula of Na2Zn2(CO3)2. It is a white, crystalline powder that has a slightly salty, alkaline taste. It is used as a food additive, a source of sodium, zinc, and carbonate ions, and a buffer agent. SZC is also used in medical applications as a laxative, in the formulation of toothpaste, and as a component of certain cosmetics and personal care products.